Thermostatic controlling device



Ma rch 28, 1933. P. J. JORGENSEN ET AL 1,902,858

THERMOSTATIC CONTROLLING DEVICE Filed Aug. 2, 1930 Patented Max:228,1933 UNITED STATES PATENT OFFICE,

rmuos'rarrc CONTROLLING- imvrcr.

Application fi led August 2, 1980. Serial No. 472,647.

This invention relates to thermostatic controlling. devices and has forits ob ect to provide a new and improved device of this description. Theinvention has as a further object to provide a thermostatic controllingdevice particularly adapted to be used in connection with the coolingsystem of an internal combustion engine. The invention has as a furtherobject to provide 0 a therinostatic controlling device for use in thecooling circulatory system of an internal combustion engine, arrangedso" that the valve controlled by the thermostat will be delayed in thestartinfgl ofits opening and will then be quickly llyv opened so as todelay the starting of the opening of the valve until the temperaturereaches a higher point than is "ordinarily the case, and then .tocomplete the opening of the valve through a much shorter rangeoftemperature than is ordinaril the case. The invention has as a further 0ject to provide-a device of the kind described wherein the ran e otemperature between the starting 0 the opening of the valve and itscomplete opening is confined to a comparatively small range. Theinvention has further ob ects which are more particularly pointed out inthe accompanying description.

ferring now. to the drawing, Fig. 1

shows an, internal combustionengine provided with one form of apparatusembody ing the invention;

ig.., 2 is an. enlarged sectional view through the support for the valvecontrolled by the thermostat; Fig. .3. is a sectional view+ mn on theline 3-3of Fig. 2; V Fi 4 is a slde elevation of the support fortevalve. l

like numerals refer to, like out the several figures.

Referring now to the drawing, we have parts throughshown an internalcombustion engine 1,5 a-

water jacket 2 having a connectionBeXtefidzing to the radiator 4, theradiator having a connection 5 leading back to the water jacket. A pump6 is provided which pumps the cooling fluid through the coolingcirculatory system. Located within the connection 3' is a controllingdevice for controlhng the circulatory systeni. This controlling deviceas herein shown consists of va valve 7 pivoted at 8 and 9 with a support 10. This support is shown as a cyhndrical member having a flange 11by means of which it is held in place, the flange being clamped betweenthe flanges 12. and 13 of the portions of the connection 3, as shown inFig. 1. A thermostatic member 14, made up of any suitable material, hasan end portion 15 which is'connected with the valve 7 at a point. at onesideof its pivotal connection with its, support. This connection may bemade in any desired inanner. As herein shown, the end 15 is connected bya pivot 16 with a. link 17 which projects through an opening in thevalve, and which is connected by a pivot 18 with the housing 19attachedto the side of the valve. Thishousing completely covers theopening in the valve to prevent ny leakage therethrough. The thermo aticmember is shown as a coiled memberwith its end connected to a shaftlwmounted in the projections 14b extending from the support 10.

The pump forces the cooling liquid in the direction of the' arrow shownin Fig. 2. Connected with the support 10 on the side of the valve 7oppositeto that on which the thermostatic member is located, is a baflie20 which is shown with its inner end inclined toward the valve. Thisbaflie may be formed in any desired manner and as herein shown consists.of a plate inserted in a slot in the support 10. This support isprovided with one or more open slots 21 intermediate the valve isvclosed will strike the baflie 20 and be directed through the j openings21.

' ,When the valve 7 is opened to its full open position, it strikes theend 15 of the thermostatic element and this end acts as a stop toprevent the valve from fu rther movement and to insure the full 0 npo'sitionwithout permitting the valve full open position.

move beyond this is set in operation and tends to circulate the liquidin the cooling circulatory system. The valve 7, however, prevents thiscirculation and holds the cooling fluid in the water jacket around thecylinder. Until this cooling fluid is heated, this holding, of

. and permit the the fluid in this position causes the engine to heat upquickly", which is the thing desired. When the cooling fluid reaches apredetermined temperature, it acts upon the thermostatic element 14 soas to cause it to move the valve 7 towards its open position circulationof the cooling fluid through the radiator, due to the action ofthe pump6.

Now there are certain difiiculties in connection with a thermostaticdevice of this description which the present construction is arranged toovercome. In the ordinary thermostatic device it takes a change intemperature of from to 5Q degrees to move the valve from its closed toits open position. This means that if the valve is fully opened at theproper time, it must start to I open altogether too soon for the presentpractice. That is, it must start to open before the temperature of theengine has been brought up to a'suflicient height.' Further-- if thethermostat is set to start to opmore,

reached the erate when the temperature has height desired,'then thevalve is not fully opened until the temperature becomes too high. This.is particularly objectionable A hen alcohol is used as the coolingliquid, due to the fact that the alcohol boils at a comparatively lowtemperature. For example, if the thermostat takes 40 to 50 degreeschange in temperature to move ,the

valve from its closed to its open position, it will be necessary toarrange the device so that it will start to open at, say 130 to 135degrees so that it would be fully opened before the tem erature reached,say 175 degrees F., whic is approximately t e boiling point of alcohol.

With the present construction the variations in temperature requiredbetween the starting of the opening of the valve and the completeopening is very greatly reduced, and instead of having the valve startat, say 130 to 135 degrees, with the present device it can be arrangedto start to open the valve at 150 to 160 degrees, and still fully openvit before the temperature gets too high or before the temperaturereaches the boilingv point. of alcohol. In other words, with the presentdevice the range of variation in temperature between the point where thevalve starts to open and is 7 I completely opened is reduced to 12 or 15degrees. This condition is brought about by the arrangement of thebaffle 20. The

thermostat can beset to start to open the valve at the desired highertemperature.

When the valve starts to open, due to the thermostat being brought tothe desired temperature, the cooling liquid passes by it by its edge andstrikes the 'bafile 20 and then rebounds and strikes the side of thevalve opposed to the bathe, and this tends to open the valve with aforce additional to that applied by the thermostatic element. As

the valve opens more, more cooling liquid 1 ble to have the baflle 20project quite a distance along the valve 7, and that when the valvebegins to open it will then be produced to greater force by therebounding liquid, tending to openit at the start. To

prevent this we have provided the openings 21, so that a part of thisliquid passes through these popenings, thereby reducing the openingeffect of the rebounding'liquid. When the valve is opened, a greateramount, the quantity of water is so increased that the amount goingthrough these openings becomes practically negligible.

We have found that in practice it is often desirable to provide a smallopening 22 in the valve 7, as shown in Fig. 2. -This is due to the factthatthe pump in operation causes considerable pressure on the valve 7and on the pivots of said valve, particularly where high pressures .areused, and this tends to make the temperature run up too high beforethevalve starts to open. By means of this opening 22, this difliculty,we

find, is overcome, for by its use a slight unbalancing effect isproduced when the valve is in its closed position and this unbalancingeffect is brought about without upsetting the balanced condition afterthe valve has left its seat.

It will therefore be seen that with the construction herein shown thevalve 7 is. held closed through alonger period and until the temperatureof the engine has reached a comparatively high point. The thermostatthen starts to open the valve and the liquid, flowing past the edge ofthe valve, striking the baffle 20, rebounds and applies an opening forceto the valve to help open 1t, this force being in addition to thatapplied by the thermostat. In fact, it can be arranged so that thisforce will overcome any backward pull that the thermostat might have onthe valve, so that by proper proportioning of the parts, the valve canbe ened to its full open position through-a s ort range of temperatureafter it has started to open. This range of temperature is controlled bythe proper arrangement of the parts.

- -It is of course evident that the tem-' perature at which the valveopens can be regulated as desired,- and we have simply referred tocertain degrees of temperature for the purpose of making our inventionclear. It will further be seen that with this construction the valve maybe pivotall mounted at its center so as to'be balance and still suchvalve can be held closed until the desired temperature is-reached andcan then be quickly opened. It will also be seen that by means of thisconstruction the parts canbe arranged so that there will be.no danger ofan over run of the temperature before the valve opens.

We claim: 7

1. A thermostatic controlling device comprising a valve, a supporttherefor having a passageway closed by said valve, a thermostaticelement connected with said valve for moving said valve in response tovariations in temperature, a bafiie projecting intosaid passageway andagainst which the liquid flowing past the valve while it is being openedstrikes said liquid rebounding and striking the valve so as to apply anopening pressfire to it.

. 2., A thermostatic controlling device com- Y prising a valve, asupport therefor having a passageway closed by said valve, athermostatic element connected with said valve for moving said valve inresponse to variations in temperature, a baflle projecting into saidpassageway and against which the liquid, past the, valve whileit isbeing opene strikes said liquid rebounding and striking the valve so asto apply an opening I pressure to it, and a liquid discharge opening insaid support between the baffle and the valve.

3. A thermostatic controlling-device comprising a valve, a supporttherefor having a passageway closed by said valve, a thermostaticelement connected with said valve for moving said valve in response tovariations in temperature, a baflle projecting into said assageway andagainst which the liquid flowing past the valve while it is being openedstrikes said liquid rebounding and striking the valve so as to apply anripening passageway and against which the liquid owing. past the valvewhile it is being opened strikes saidliquid rebounding an Striking thevalve so as to apply an opening pressure to it, and a liquid dischargeopen? ing in, said support between the bafile and the valv'e, the valvebeing provided with an opening in'the. portion-thereof in proximity 'tosaid baflle.

5. A thermostatic controlling device comprising a valve, a supporttherefor having a passageway closed by said valve, a thermostaticeleinent connected with said valve for moving said valve in response tovariations in tempergature, and means for utilizing the pressure ofliquid after it has passed the valve to apply an opening pressuieto saidvalve.

6. A thermostatic controlling device comprising a valve, a supporttherefor having a passageway closed by said valve, a thermostaticelement connected with said valve for moving said valve in response tovariations in temperature, and means for utilizin :the

pressure of liquid after it, has passe the valve to apply an openingpressure to said valve, and means for reducing the effectiveness of thispressure at the beginning of the opening of the valve. 7 A thermostaticcontrolling device comprising a valve, a support therefor having apassageway controlledby said valve, said valve pivotally connected nearits middle with said support, a thermostatic element mounted inalignment with said valve and connected therewith at one side of thepivotal connection, and means for utilizin the pressure of liquid afterit has passe the valve to apply an openin pressure to said valve on theother side 0' said pivotal connection.

8. A thermostatic controlling device. comprising a valve, a supporttherefor having a passageway controlled by said valve, said.

valve pivotally connected near its middle ,with said support; athermostatic element mounted in alignment with said valve and connectedtherewith at one side of the pivotal connection, means for utilizing thepres sure of liquid after-it has passed the valve to apply an openingpressure to said valve on the other side of said ivotal connection,

and means for reducing t e effectiveness ofsaid pressure atthe'beginningof the opening of the valve.

PETER J. J ORGENSEN.

CLARENCE H. J ORGENSEN.

